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12 changes: 6 additions & 6 deletions tools/strip-lib.py
Original file line number Diff line number Diff line change
@@ -1,10 +1,10 @@
# nulls the timestamp filed in a windows .lib archive,
# making the lib reproducable.
# nulls the timestamp field in a windows .lib archive,
# making the lib reproducible.
# the time is the TimeDateStamp in the COFF file header, four bytes at offset 4
# See https://blog.conan.io/2019/09/02/Deterministic-builds-with-C-C++.html
# also: https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#archive-library-file-format
#
# There are some additional fixes added for reproducability, such as fixing the zero-padding of names in the coff
# There are some additional fixes added for reproducibility, such as fixing the zero-padding of names in the coff
# section headers.

import struct
Expand Down Expand Up @@ -82,7 +82,7 @@ def read_lib(fp):
print("longnames", result["longnames"])
h = None

# now read the headers, possibly we alread read one above.
# now read the headers, possibly we already read one above.
while True:
if h is None:
h = header_read(fp)
Expand Down Expand Up @@ -202,13 +202,13 @@ def first_lm_write(fp, lm):

def second_lm_read(fp):
# number of members
m = struct.unpack("<L", fp.read(4))[0] # unsigned long, big-endian
m = struct.unpack("<L", fp.read(4))[0] # unsigned long, little-endian
offsets = []
for _ in range(m):
offsets.append(struct.unpack("<L", fp.read(4))[0])

# number of symbols
n = struct.unpack("<L", fp.read(4))[0] # unsigned long, big-endian
n = struct.unpack("<L", fp.read(4))[0] # unsigned long, little-endian
indices = []
for _ in range(n):
indices.append(struct.unpack("<H", fp.read(2))[0]) # unsigned short
Expand Down